In the Mayer museum are found, among other invaluable treasures, some enamels on copper bearing impressions from copper-plates transferred to them, and having the name of “_J. Sadler, Liverp^l, Enam^l_,” and other examples of enamels and of earthenware with the names of “_Sadler, Sculp._,” or of “_Green_.” Messrs. Sadler and Green appear to have done a very profitable and excellent business in the printing on pottery. The process was soon found to be as applicable to services and other descriptions of goods as to tiles; and these two enterprising men produced many fine examples of their art, some of which, bearing their names as engravers or enamellers, are still in existence. Josiah Wedgwood, always alive to everything which could tend to improve or render more commercial the productions of his manufactory, although at first opposed to the introduction of this invention, as being, in his opinion, an unsatisfactory and unprofitable substitute for painting, eventually determined to adopt the new style of ornamentation, and arranged with the inventors to decorate such of his Queen’s ware as it would be applicable to, by their process. The work was a troublesome one, and in the then state of the roads--for it must be remembered that this was before the time even of canals in the district, much less of railroads--the communication between Burslem and Liverpool was one of great difficulty. Wedgwood, however, overcame it, and having made the plain body at his works in Staffordshire, packed it in waggons and carts, and even in the panniers of pack-horses, and sent it to Liverpool, where it was printed by Sadler and Green, and returned to him by the same kind of conveyance. The works of Sadler and Green were in Harrington Street, at the back of Lord Street, Liverpool, and here they not only carried on their engraving and transfer-printing for other potters, but made their own wares, and carried on an extensive business. It was here that they printed ware for Josiah Wedgwood. Of this connection of Wedgwood with the Liverpool works, Mr. Mayer thus writes:--